TRILLIUM SESSILE L. Sp. Pl. 340. 1753.
Perennial by an erect or ascending corm-like rootstock, deep green, glabrous. Stems solitary or clustered, erect, 1-2 dm. tall, slender ; leaves oval or suborbicular, 4-8 cm. long, obtuse or acute, rounded at the base, sessile, 3-5 nerved, not mottled ; flowers ses sile ; sepals lanceolate, 2-3 cm. long, acute or acutish ; petals nar rowly elliptic, slightly shorter than or longer than the sepals, sessile, acutish, purple ; stamens about as long as the petals ; filaments dilated at the base, shorter than the anthers ; styles elong ated, nearly straight, berry not seen.
In woods, Pennsylvania to Minnesota, south to Florida and Mississippi. April and May.